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Improvement in desorption kinetics of NaAlH4 catalyzed with TiO2 nanopowder by Gil-Jae Lee; Jae-Hyeok Shim; Young Whan Cho; Kyung Sub Lee is a Engineering article available to read on EtoBox.

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NaAlH 4 has been homogeneously mixed with micron-and nano-sized TiO 2 powders by high-energy ball milling and their sorption properties have been investigated during hydrogen absorption/desorption cycles. NaAlH 4 with TiO 2 nanopowder exhibits as good desorption kinetics as NaAlH 4 with TiCl 3 , whereas poor desorption kinetics is observed with micron-sized TiO 2 powder. NaAlH 4 with TiO 2 nanopowder also provides improved cyclic property compared to NaAlH 4 with TiCl 3 in terms of both desorption rate and hydrogen capacity. X-ray diffraction analysis shows that micron-sized TiO 2 remains stable with NaAlH 4 after milling, although thermodynamic calculation predicts that TiO 2 reacts with NaAlH 4 .

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Author

Gil-Jae Lee; Jae-Hyeok Shim; Young Whan Cho; Kyung Sub Lee

Publisher

Elsevier Science; Elsevier ; Elsevier Ltd.; Elsevier BV (ISSN 0360-3199)

Published

2008

Language

EN

Field

Engineering (Physical Sciences)